This cassette offers much better performance, range and weight savings compared to Shimano's 11-46 XT cassette. I've been running it for a couple months now and it works just as good as the day I installed it. Tooth wear looks minimal to non-existent at this point in the cassette's life; however, it's too early to tell what the longevity will be. I'm running this cassette with a 32T chainring up front on 170mm cranks. I mostly use the 2nd lowest gear (39T) for climbing and only use the 46T as a recovery or "bail out" gear. The 9T and 10T...